Test/review of UltraFire TR18650 5000mAh (Blue) 2018

[SIZE=+3]UltraFire TR18650 5000mAh (Blue) 2018[/SIZE]



Official specifications:

• No memory effect, recharge up to 1000 cycles
• 100% brand new 18650 rechargeable batteries
• 100% quality Japanese battery cells
• 100% Q.C. of every battery
• Capacity: 5000mAh
• Voltage: 3.7 V
• Chemistry: Li-ion

With the above specifications this must be good batteries? Or maybe not!









The wrapper is, as usual, wrong, there is no PCB in these batteries.



The batteries can deliver about 2A and has a capacity of 1100mA


















[SIZE=+3]Conclusion[/SIZE]

I have tested this battery a few years ago and it has not improved with time, it is slightly worse.

It is a bad battery, with wrong specifications. It is cheaper to buy good batteries!



[SIZE=+3]Notes and links[/SIZE]

How is the test done and how to read the charts
How is a protected LiIon battery constructed
More about button top and flat top batteries
Compare to 18650 and other batteries

Thanks for the test! This is very valuable for dissuading people buying cheap junk batteries.
And the worst with this battery is not the strongly exaggerated performance specification but the lack of protection while claiming it has it!

What do you all think of these batteries (as in the brand itself) for really low discharge applications? I just bought a laser in the 80 milliwatt range that came with an Ultrafire 18650 and charger.

So, around 20ma current, kind of stupid battery choice as far as I'm aware (excessive runtimes if you ask me...).

Probably going to buy a volt meter - sure not going to rely on this charger to know what's up...

Oh, this is a 3000mah cell, if that makes any difference...

I would never trust this battery/charger setup for a high discharge application, but for something this "weak" (in terms of current, not the LASER), any opinions?

Dude Dudeson said:

What do you all think of these batteries (as in the brand itself) for really low discharge applications? I just bought a laser in the 80 milliwatt range that came with an Ultrafire 18650 and charger.

Click to expand...

I do not like them. They may work in a low drain situation, but I would prefer a good 2600mAh cell (They are usual fairly cheap) or better.

HKJ said:

I do not like them. They may work in a low drain situation, but I would prefer a good 2600mAh cell (They are usual fairly cheap) or better.

Click to expand...

Yeah, I'll probably switch to something else. As said it's ridiculous for this device to even have an 18650 in the first place - I think they were going for "tacticool' in terms of that and host size. For ten bucks I didn't bother researching much. Awesome laser, I'll say that much, but stupid battery choice IMO. This thing doesn't use nearly the power of a "flashaholic flashlight" - despite being far more deadly to retinas though...

Bin them, it's really not worth the risk.
P